Abstract
Injectable hydrogels as an important class of biomaterials have gained much attention in tissue engineering. However, their crosslinking degree is difficult to be controlled after being injected into body. As we all know, the crosslinking degree strongly influences the physicochemical properties of hydrogels. Therefore, developing an injectable hydrogel with tunable crosslinking degree in vivo is important for tissue engineering. Herein, we present a dual crosslinking strategy to prepare injectable hydrogels with step-by-step tunable crosslinking degree using Schiff base reaction and photopolymerization. The developed hyaluronic acid/poly(γ-glutamic acid) (HA/γ-PGA) hydrogels exhibit step-by-step tunable swelling behavior, enzymatic degradation behavior and mechanical properties. Mechanical performance tests show that the storage moduli of HA/γ-PGA hydrogels are all less than 2000 Pa and the compressive moduli are in kilopascal, which have a good match with soft tissue. In addition, NIH 3T3 cells encapsulated in HA/γ-PGA hydrogel exhibit a high cell viability, indicating a good cytocompatibility of HA/γ-PGA hydrogel. Therefore, the developed HA/γ-PGA hydrogel as an injectable biomaterial has a good potential in soft tissue engineering.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (No.31771049), Foundation of key R&D Project of Jiangsu Province (No.BE2018731), Research Foundation of State Key Laboratory of Materials-Oriented Chemical Engineering (Nos.ZK201806 and No.KL18-06) and the Six Talent Peaks Project of Jiangsu Province (No.SWYY-046)
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Injectable Hyaluronic Acid/Poly(γ-glutamic acid) Hydrogel with Step-by-step Tunable Properties for Soft Tissue Engineering
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Ma, XB., Yang, R., Sekhar, K.P.C. et al. Injectable Hyaluronic Acid/Poly(γ-glutamic acid) Hydrogel with Step-by-step Tunable Properties for Soft Tissue Engineering. Chin J Polym Sci 39, 957–965 (2021). https://doi.org/10.1007/s10118-021-2558-3
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DOI: https://doi.org/10.1007/s10118-021-2558-3